Quantitative 3D real-space analysis of Laves phase supraparticles
Da Wang1,2, Ernest B van der Wee3,4, Daniele Zanaga5,6
1Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, The Netherlands. dawangcolloid@gmail.com.
Nature Communications
|June 26, 2021
Summary
Researchers analyzed thick binary nanoparticle crystals, revealing that excess particles enable bulk-like structures. This method allows detailed study of complex crystal lattices and their properties.
Area of Science:
- Materials Science
- Nanotechnology
- Crystallography
Background:
- Binary nanoparticle mixtures form crystals with unique collective properties.
- 3D structural analysis of thick (over 10 layers) binary colloidal crystals is challenging.
- Understanding self-assembly and structure-property relationships in nanomaterials is crucial.
Purpose of the Study:
- To develop and demonstrate a method for analyzing thick, bulk-like binary nanoparticle crystals.
- To investigate the impact of species excess on crystal formation and order.
- To provide insights into the structure formation mechanisms of binary crystals.
Main Methods:
- Utilizing electron tomography for quantitative 3D real-space analysis.
- Assembling binary nanoparticle mixtures into spherical supraparticles.
- Analyzing crystal structures exceeding 50 layers.
Main Results:
- An excess of one nanoparticle species suppresses icosahedral order, enabling study of bulk-like structures.
- Successfully analyzed Laves phase binary crystals composed of hard-sphere-like nanoparticles.
- Observed a random crystalline lattice where the species ratio matches perfect Laves crystal stoichiometry.
Conclusions:
- The demonstrated methodology enables detailed structural analysis of thick binary crystals.
- Insights into structure formation and structure-property relationships can be gained for various binary crystal systems.
- This approach advances the study of complex nanomaterials and their emergent properties.
